The Warsaw trial of Naftali Kahn, well-known Yiddish poet accused of writing “calumnies” against the Soviet Union, which opened in secret last week in Warsaw, was adjourned for six weeks pending a medical examination of the defendant, dispatches from Warsaw reported here today.

Kahn was arrested in Poland a year ago, after coming to Warsaw from Russia, and was charged with “libelous propaganda” against the Soviet Union. Soviet authorities demanded his extradition, but Poland refused to extradite him, ordering him instead to be tried in a Polish court, since he is a Polish citizen.